Node.js is an open-source, server-side runtime environment that is built on the JavaScript programming language. It allows developers to execute JavaScript code on the server, outside of a web browser. Node.js is a runtime environment that enables server-side JavaScript development. Its event-driven, non-blocking architecture, single-threaded nature, and vast ecosystem of packages make it a powerful choice for building web servers, real-time applications, microservices, and more. Node.js has gained popularity for its efficiency, scalability, and versatility in a wide range of web and server applications.

Authentication is the most common way of confirming the character of a client or element endeavoring to get to a framework, application, or asset.

Authorization is the most common way of figuring out what activities or tasks a confirmed client or substance can perform inside a framework or application. 

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